888
FNCA52 TJSJ 080730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST WED JUL 8 2026
DISCUSSION
THE DEPARTURE OF A TROPICAL WAVE WILL MAINTAIN SLIGHTLY HIGHER
LOW-LEVEL MOISTURE TODAY, LIMITING FIRE WEATHER CONCERNS DESPITE
BREEZY TO LOCALLY WINDY EASTERLY TRADE WINDS. HOWEVER, CRITICALLY
DRY VEGETATION AND PERSISTENT SOIL MOISTURE DEFICITS WILL
CONTINUE TO SUPPORT WILDFIRE DEVELOPMENT, AND ANY IGNITION COULD
STILL SPREAD THROUGH THE AVAILABLE FINE FUELS. BY THURSDAY,
BELOW-NORMAL MOISTURE, MODERATE TO HIGH CONCENTRATIONS OF SAHARAN
DUST, AND INCREASINGLY DRY CONDITIONS WILL OVERSPREAD THE REGION,
WHILE BREEZY TO WINDY TRADE WINDS PERSIST. THIS COMBINATION WILL
BECOME MORE FAVORABLE FOR WILDFIRE GROWTH THROUGH THE END OF THE
WORKWEEK AND INTO THE WEEKEND. RESIDENTS AND VISITORS SHOULD
AVOID OUTDOOR BURNING AND EXERCISE EXTREME CAUTION WITH ANY
ACTIVITY CAPABLE OF PRODUCING SPARKS OR OPEN FLAMES.
PRZ014-082000-
SOUTHEAST COASTAL PLAINS-
330 AM AST WED JUL 8 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 10 10
TEMP (24H TREND) 91 (+1) 75 (-1) 91
RH % (24H TREND) 52 (-11) 87 (-2) 49
WIND 20FT/EARLY(MPH) E 23 G31 E 19 G28 E 20 G33
WIND 20FT/LATE(MPH) E 28 E 13 E 19 G32
MIXING HGT(FT-AGL/MSL)4790 5010
TRANSPORT WND (MPH) E 22 E 25
VENT RATE (KT-FT) 91010 110220
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-082000-
SOUTHERN HILLS-
330 AM AST WED JUL 8 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 10 10
TEMP (24H TREND) 88 (+3) 71 (-2) 88
RH % (24H TREND) 62 (-7) 98 (+3) 61
WIND 20FT/EARLY(MPH) E 19 E 17 E 16
WIND 20FT/LATE(MPH) E 24 E 16 E 16
MIXING HGT(FT-AGL/MSL)5440 5610
TRANSPORT WND (MPH) E 22 E 24
VENT RATE (KT-FT) 103360 117810
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-082000-
NORTH COASTAL PLAINS-
330 AM AST WED JUL 8 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 10 10
TEMP (24H TREND) 90 (+2) 75 (-1) 91
RH % (24H TREND) 64 (-6) 97 (0) 61
WIND 20FT/EARLY(MPH) E 21 E 25 E 19 G26
WIND 20FT/LATE(MPH) E 29 E 14 E 24 G31
MIXING HGT(FT-AGL/MSL)4780 5170
TRANSPORT WND (MPH) E 26 E 24
VENT RATE (KT-FT) 109940 108570
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-082000-
NORTHERN HILLS-
330 AM AST WED JUL 8 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS NONE SHOWERS
CHANCE PRECIP (%) 50 0 10
TEMP (24H TREND) 88 (+1) 72 (-1) 90
RH % (24H TREND) 66 (-3) 98 (0) 62
WIND 20FT/EARLY(MPH) E 19 E 20 E 18
WIND 20FT/LATE(MPH) E 26 E 11 E 21
MIXING HGT(FT-AGL/MSL)5650 6350
TRANSPORT WND (MPH) E 21 E 21
VENT RATE (KT-FT) 101700 114300
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-082000-
WEST COAST-
330 AM AST WED JUL 8 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 10 20
TEMP (24H TREND) 92 (0) 74 (-1) 92
RH % (24H TREND) 63 (-2) 95 (+2) 61
WIND 20FT/EARLY(MPH) E 18 E 18 E 17
WIND 20FT/LATE(MPH) E 21 E 12 E 17
MIXING HGT(FT-AGL/MSL)4260 4720
TRANSPORT WND (MPH) E 16 E 17
VENT RATE (KT-FT) 59640 70800
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-082000-
EASTERN INTERIOR-
330 AM AST WED JUL 8 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 20 20
TEMP (24H TREND) 88 (+2) 72 (-2) 89
RH % (24H TREND) 64 (-7) 99 (+1) 64
WIND 20FT/EARLY(MPH) E 20 E 20 E 17
WIND 20FT/LATE(MPH) E 24 E 17 E 17
MIXING HGT(FT-AGL/MSL)5830 5510
TRANSPORT WND (MPH) E 21 E 23
VENT RATE (KT-FT) 104940 110200
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-082000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST WED JUL 8 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 30 30
TEMP (24H TREND) 84 (+4) 70 (-2) 84
RH % (24H TREND) 72 (-8) 100 (+1) 71
WIND 20FT/EARLY(MPH) E 18 E 18 E 14
WIND 20FT/LATE(MPH) E 20 E 14 E 14 G22
MIXING HGT(FT-AGL/MSL)4220 4630
TRANSPORT WND (MPH) E 23 E 24
VENT RATE (KT-FT) 84400 97230
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-082000-
CENTRAL MOUNTAIN RANGE-
330 AM AST WED JUL 8 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS NONE SHOWERS
CHANCE PRECIP (%) 50 0 10
TEMP (24H TREND) 87 (+4) 69 (-2) 88
RH % (24H TREND) 68 (-6) 99 (+3) 64
WIND 20FT/EARLY(MPH) E 14 E 13 E 12
WIND 20FT/LATE(MPH) E 17 E 10 E 12
MIXING HGT(FT-AGL/MSL)7150 7150
TRANSPORT WND (MPH) E 16 SE 20
VENT RATE (KT-FT) 100100 121550
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-082000-
CAYEY MOUNTAIN RANGE-
330 AM AST WED JUL 8 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 30 20
TEMP (24H TREND) 83 (+2) 71 (-1) 84
RH % (24H TREND) 72 (-5) 100 (0) 72
WIND 20FT/EARLY(MPH) E 16 E 14 E 14
WIND 20FT/LATE(MPH) E 18 E 13 E 14
MIXING HGT(FT-AGL/MSL)4610 4870
TRANSPORT WND (MPH) E 23 E 24
VENT RATE (KT-FT) 92200 102270
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-082000-
VIEQUES-
330 AM AST WED JUL 8 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 10
TEMP (24H TREND) 89 (+1) 77 (-2) 89
RH % (24H TREND) 59 (-5) 90 (-2) 60
WIND 20FT/EARLY(MPH) E 20 E 19 E 19 G27
WIND 20FT/LATE(MPH) E 20 E 20 E 19 G27
MIXING HGT(FT-AGL/MSL)3540 3500
TRANSPORT WND (MPH) E 25 E 26
VENT RATE (KT-FT) 77880 80500
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-082000-
CULEBRA-
330 AM AST WED JUL 8 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 20
TEMP (24H TREND) 91 (+2) 78 (-1) 91
RH % (24H TREND) 60 (-8) 92 (0) 61
WIND 20FT/EARLY(MPH) E 20 E 19 E 19 G28
WIND 20FT/LATE(MPH) E 20 E 20 E 19 G27
MIXING HGT(FT-AGL/MSL)3850 3700
TRANSPORT WND (MPH) E 25 E 26
VENT RATE (KT-FT) 84700 85100
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-082000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST WED JUL 8 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE NONE
CHANCE PRECIP (%) 30 0 0
TEMP (24H TREND) 91 (0) 75 (-2) 91
RH % (24H TREND) 52 (-8) 85 (0) 49
WIND 20FT/EARLY(MPH) E 21 G31 E 20 G30 E 24 G38
WIND 20FT/LATE(MPH) E 27 E 16 E 24 G39
MIXING HGT(FT-AGL/MSL)4750 5140
TRANSPORT WND (MPH) E 26 E 28
VENT RATE (KT-FT) 109250 123360
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-082000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST WED JUL 8 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 10 10
TEMP (24H TREND) 88 (+2) 77 (-2) 88
RH % (24H TREND) 65 (-5) 93 (+1) 64
WIND 20FT/EARLY(MPH) E 21 E 19 E 19 G27
WIND 20FT/LATE(MPH) E 20 E 20 E 19 G28
MIXING HGT(FT-AGL/MSL)4110 3700
TRANSPORT WND (MPH) E 26 E 29
VENT RATE (KT-FT) 94530 92500
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-082000-
ST CROIX-
330 AM AST WED JUL 8 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 10
TEMP (24H TREND) 89 (+2) 77 (-2) 89
RH % (24H TREND) 63 (-7) 91 (-2) 64
WIND 20FT/EARLY(MPH) E 20 E 20 E 19 G27
WIND 20FT/LATE(MPH) E 20 E 20 E 20 G28
MIXING HGT(FT-AGL/MSL)4400 4310
TRANSPORT WND (MPH) E 29 E 28
VENT RATE (KT-FT) 110000 103440
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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